<footer>
    <div>
        <p>版权所有 &copy; 终结的月月鸟 .WJP</p>
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</footer>

<style>
    footer{
        position: fixed;
        bottom: 0;
        left: 0;
        text-align: center;
        width: 100%;
        height: 40px;
        line-height: 40px;
        background-color: #222;
        color: aliceblue;
    }
</style>